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Figure, shows the transverse section of ...

Figure, shows the transverse section of a hill. A ball of mass 0.5 kg is given a K.E. of 300J at `A` and rolls down to `C`. Assuming that there is no friction, calculate
(i) K.E. of ball at `B`
(ii) P.E. of ball at `C`, taking P.E. at `A` equal to zero
(iii) speed of the ball at `C`, and
(iv) change is P.E. in going from `B` to `C` . Take `g=10m//s^(2)`

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